On the way home from school, a high school student finds a mysterious wooden box containing a strange figurine and an old letter. The figurine is a six-inch-tall fairy from another world. The game involves chaperoning whichever of three fairies is chosen as she explores the human world — sometimes helping, sometimes causing chaos — while events and scenes unlock based on how the relationship develops. A real-life classmate may or may not become a love interest as well, depending on how the player manages the overlapping demands of family, friends, and an extremely small houseguest.